During orgasm, the brain releases massive amounts of oxytocin and dopamine. Oxytocin, also known as the "love hormone," promotes feelings of connection and bonding with a partner after orgasm, while dopamine is a "feel-good" neurotransmitter connected to the reward center of the brain. Oxytocin is also responsible for rhythmic muscle contraction and ejaculation. Prolactin is another hormone that is released during orgasm and is responsible for the feeling of satisfaction that accompanies orgasm.